Merging r262230:

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r262230 | vkalintiris | 2016-02-29 15:58:12 +0000 (Mon, 29 Feb 2016) | 7 lines

[mips] Do not use SLL for ANY_EXTEND nodes as the high bits are undefined.

Reviewers: dsanders

Subscribers: dsanders, llvm-commits

Differential Revision: http://reviews.llvm.org/D15420
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llvm-svn: 271126

llvm/lib/Target/Mips/Mips64InstrInfo.td

@@ -518,7 +518,8 @@ def : MipsPat<(rotr GPR64:$rt, (i32 (trunc GPR64:$rs))),
               (DROTRV GPR64:$rt, (EXTRACT_SUBREG GPR64:$rs, sub_32))>;
 
 // 32-to-64-bit extension
-def : MipsPat<(i64 (anyext GPR32:$src)), (SLL64_32 GPR32:$src)>;
+def : MipsPat<(i64 (anyext GPR32:$src)),
+              (INSERT_SUBREG (i64 (IMPLICIT_DEF)), GPR32:$src, sub_32)>;
 def : MipsPat<(i64 (zext GPR32:$src)), (DSRL (DSLL64_32 GPR32:$src), 32)>;
 def : MipsPat<(i64 (sext GPR32:$src)), (SLL64_32 GPR32:$src)>;
 

llvm/test/CodeGen/Mips/cconv/return-struct.ll

@@ -158,9 +158,6 @@ entry:
 ; sret pointer is already in $4
 ; N32-DAG:        lui [[PTR_HI:\$[0-9]+]], %hi(struct_128xi16)
 ; N32-DAG:        addiu [[PTR:\$[0-9]+]], [[PTR_HI]], %lo(struct_128xi16)
-; FIXME: This signext isn't necessary. Like integers, pointers are
-;        but unlike integers, pointers cannot have the signext attribute.
-; N32-DAG:        sll $5, [[PTR]], 0
 ; N32:            jal memcpy
 
 ; sret pointer is already in $4

llvm/test/CodeGen/Mips/fcopysign-f32-f64.ll

@@ -1,14 +1,18 @@
-; RUN: llc  < %s -march=mips64el -mcpu=mips4 -target-abi=n64 | FileCheck %s -check-prefix=64
-; RUN: llc  < %s -march=mips64el -mcpu=mips64 -target-abi=n64 | FileCheck %s -check-prefix=64
-; RUN: llc  < %s -march=mips64el -mcpu=mips64r2 -target-abi=n64 | FileCheck %s -check-prefix=64R2
+; RUN: llc  < %s -march=mips64el -mcpu=mips4 -target-abi=n64 | \
+; RUN:    FileCheck %s -check-prefix=ALL -check-prefix=64
+; RUN: llc  < %s -march=mips64el -mcpu=mips64 -target-abi=n64 | \
+; RUN:    FileCheck %s -check-prefix=ALL -check-prefix=64
+; RUN: llc  < %s -march=mips64el -mcpu=mips64r2 -target-abi=n64 | \
+; RUN:    FileCheck %s -check-prefix=ALL -check-prefix=64R2
 
 declare double @copysign(double, double) nounwind readnone
 
 declare float @copysignf(float, float) nounwind readnone
 
 define float @func2(float %d, double %f) nounwind readnone {
 entry:
-; 64:     func2
+; ALL-LABEL: func2:
+
 ; 64-DAG: lui  $[[T0:[0-9]+]], 32767
 ; 64-DAG: ori  $[[MSK0:[0-9]+]], $[[T0]], 65535
 ; 64-DAG: and  $[[AND0:[0-9]+]], ${{[0-9]+}}, $[[MSK0]]
@@ -30,17 +34,18 @@ entry:
 
 define double @func3(double %d, float %f) nounwind readnone {
 entry:
-
-; 64:     func3
-; 64-DAG: daddiu $[[T0:[0-9]+]], $zero, 1
-; 64-DAG: dsll   $[[T1:[0-9]+]], $[[T0]], 63
-; 64-DAG: daddiu $[[MSK0:[0-9]+]], $[[T1]], -1
-; 64-DAG: and    $[[AND0:[0-9]+]], ${{[0-9]+}}, $[[MSK0]]
-; 64-DAG: srl    $[[SRL:[0-9]+]], ${{[0-9]+}}, 31
-; 64-DAG: sll    $[[SLL:[0-9]+]], $[[SRL]], 0
-; 64-DAG: dsll   $[[DSLL:[0-9]+]], $[[SLL]], 63
-; 64:     or     $[[OR:[0-9]+]], $[[AND0]], $[[DSLL]]
-; 64:     dmtc1  $[[OR]], $f0
+; ALL-LABEL: func3:
+
+; 64-DAG: mfc1    $[[MFC:[0-9]+]], $f13
+; 64-DAG: srl     $[[SRL:[0-9]+]], $[[MFC:[0-9]+]], 31
+; 64:     dsll    $[[DSLL:[0-9]+]], $[[SRL]], 63
+; 64-DAG: daddiu  $[[R1:[0-9]+]], $zero, 1
+; 64-DAG: dsll    $[[R2:[0-9]+]], $[[R1]], 63
+; 64-DAG: daddiu  $[[R3:[0-9]+]], $[[R2]], -1
+; 64-DAG: dmfc1   $[[R0:[0-9]+]], ${{.*}}
+; 64:     and     $[[AND0:[0-9]+]], $[[R0]], $[[R3]]
+; 64:     or      $[[OR:[0-9]+]], $[[AND0]], $[[DSLL]]
+; 64:     dmtc1   $[[OR]], $f0
 
 ; 64R2: ext   ${{[0-9]+}}, ${{[0-9]+}}, 31, 1
 ; 64R2: dins  $[[INS:[0-9]+]], ${{[0-9]+}}, 63, 1
@@ -51,4 +56,3 @@ entry:
   %call = tail call double @copysign(double %add, double %conv) nounwind readnone
   ret double %call
 }
-